Commit 1ff4d58a authored by Andi Kleen's avatar Andi Kleen Committed by Ingo Molnar
Browse files

x86: Add rdpmcl() 



Add a version of rdpmc() that directly reads into a u64

Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1338944211-28275-4-git-send-email-andi@firstfloor.org


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 1c2ac3fd

arch/x86/include/asm/msr.h

+2 −0
Original line number Diff line number Diff line
@@ -237,6 +237,8 @@ do { \ 
	(high) = (u32)(_l >> 32);			\

} while (0)



#define rdpmcl(counter, val) ((val) = native_read_pmc(counter))



#define rdtscp(low, high, aux)					\

do {                                                            \

	unsigned long long _val = native_read_tscp(&(aux));     \

arch/x86/include/asm/paravirt.h

+2 −0
Original line number Diff line number Diff line
@@ -252,6 +252,8 @@ do { \ 
	high = _l >> 32;			\

} while (0)



#define rdpmcl(counter, val) ((val) = paravirt_read_pmc(counter))



static inline unsigned long long paravirt_rdtscp(unsigned int *aux)

{

	return PVOP_CALL1(u64, pv_cpu_ops.read_tscp, aux);

CRA Git | Maintained and supported by SUSTech CRA and CCSE